Draft mechanism.



s. J. MATTHEWS.

DRAFT MECHANISM. APPLICATION FILED DEC. 11, 1914.

1,146,339. Patented July 13, 1915.

5 46 2 SHEETS-SHEET 1.

Fig.1.

' WITNESSES AQGM Specification of Letters Patent.

mama-ra as, 1915.

Application filed December 11,1914. Serial No'. $76,664.

To all whom it may concern:

Be it known that I, SooTT J. MATTHEWS, a citizen of the United States, and a resident of Port Clinton, in the county of Ottawa and State of Ohio, have invented a certain new and useful Draft Mechanism; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this specification.

My invention relates to draft mechanisms such as capstans, windlasses and hoists. It particularly relates to electrically operated draft mechanisms. In devices of this class the motor must be protected from the swish of water from rain and, in the case of capstans, from sea.

By my invention I have provided a means wherebythe draft mechamsm may be operated by a motor located within the drum of the mechanism and one which is exceedingly eflicient and compact and may be readily assembled.

The invention may be contained in many forms of constructions usable for different purposes, all of which come within the purview of my claims hereinafter appended. To show the practicability of my invention, I have selected one of such constructions as an example and shall describe it hereinafter. The construction selected is illustrated in the accompanying drawings. 7

Figure 1 ofhe drawings is a vertical sectional view of a capstan which I have selected for purposes of illustration. Fig. 2 illustrates a horizontal sectional view along the line marked X-X in Fig. 1. Fig. 3 illustrateslifting cams for operating a clutch. Fig. 4 is a side view of the capstan, and Fig. 5 is a top view.

1, Fig.1, is the rotatable capstan shell, the barrel or drum having the usual slightly conical surface 2 about which turns of a "rope may be thrown. ,lt alsohas the receiving flange 3, having the usual curved surface 4 leadingto the cone surface 2 for axially forcing the turns of the cable as it is receivedi'n the operation of the capstan. The shell 1 is entirely closed. It is provided with bar sockets 5 which are closed by the rear walls 6 forming the bottom or the rear ends of the sockets.

The capstan is also,

provided with a closed chain grip channel 10 which extends" into the capstan shell 1. A chain chute 19 may be secured to the base 22. It is provided with the usual finger piece and mouth for engaging with and receiving the chain from the chain grip channel 10. The capstan is also provided with a channel 11 having therein the brake strap 12 which coacts with the surface of the bottom of the channel 11 to grip the capstan or brake its movements. The channel 11 is located in a downwardly extending flange portion of the capstan shell. The strap 12 may be operated by means of the lever arm 17 having an eccentric or cam 18 about which one end of the strap 12 is secured. Rotating the lever 17 about its axis causes the eccentric to draw on the strap 12 and brake or grip the capstan in the manner well known in the art. The lower edge of the flange 13 is provided with a plurality of dogs 14 which coact with a rack 15 located on the supporting base to hold the capstan in any position to which it may be turned by the motor or by means of the capstan bars. Spring pressed buttons or knobs 16 are located within the area of the angular movement of the capstan dogs 14 so as to yieldingly hold the. dogs away from the ratchet or engaging rim or rack 15. They may be pushed by the detent by pressure of hand or foot to engaging or disengaged positions. The capstan shell is also provided with a depending flange 20-which overlaps an upwardly extending flange or ridge 21 located on the supporting base 22.

The base 22 may be secured to thedeok of the boat. It is provided with a saucerlike web 23 which is suitably reinforced to withstand the strains to which the capstan is subjected. The base completely closes or covers the lower end of the capstan shell. It also closes or covers a housing 24 to which it is secured by a suitable means, such as,

- the bolts 25. The housing 24 is formed of wise suitably secured together. The lower end of the shell 24 has a bearing for the shaft 32 to which the pinion 33 is keyed and I to which the gearing contained in the gearing box 30 is connected. The pinion 33 operates upon three idlers 34 which gear with an annular internal gear wheel 35. The annular gear 35 is bolted to the periphery of a porting table and axially movable on the lower end or closes the lower ends of the housing and capstan shell. The shift block 37 is provided with a cam 38 having a plurality of peripherally arranged cam surfaces which coact with the cam 39 having similar cam surfaces formed centrally on the web 23 of the supbase 22. The shift block 37 is rota- 28 of the housing 24. It is provided with an arm 40 for turning the block 37 on the outer surface of the bearing 28 so as to cause the cam surfaces 38 and 39 to lift the block 37, the plate 36 and the annular gear 35. A suitable clutch mechanism, such as, a cone clutch may be operated to connect the annular gear with the shell or drum of the draft mechanism. In the particular form shown the upper edge of the annular gear 35 is provided with a ratchet 42-which engages and coacts with a ratchet 43 secured to the inside of the capstan shell 1. When the gears are operated and the annular gear is lifted they will cause the rotation of the capstanshell.

The motor 31 is contained within and bolted to the upper part 26 of the housing and rests on the upper end of thelower part 27 of the housing. The upper end of the inner shell is provided with a cap. nut 46 which threads into the housing 24. The cap nut 46 is provided with a ball race 47 which I bears laterally against a ring 48 which is secured in the capstan shell 1. The upper side of the ring 48 is also provided with a ball raceway 49 containing balls which bears against the ring 50 supported on the under side of a flange 51 forming a part of the screw cap 46. The top of the capstan shell is closed by means of the cover 52 which may be forced over an'upwardly extending flange 53.

The lower edge ofthe capstan shell is provided with a ball raceway 55 having balls located therein'and theraceway 56 formed in the flange or ridge 21 of the supporting base. The capstan shell is thus mounted so that it may be easily rotated and its bearingsare so placed that the strains to which it may be subjected will be sustained. The 1 being located at three points driving force of the capstans periphery and without the area of the barrel -of the capstan gives symmetrical and uniform driving. pressure upon the capstan and increased stability to the capstan. Furthermore, the annulargear is secured to the base or support. and is located within a depending flange of the capstan shell forming thereby a large pressure area for. sustaining the capstan in position.

The construction selected and described may be greatly varied in the arrangement and manufacture of its parts and in the substitution of elements having equivalent functions and such modifications may be used for many varied purposes and still contain the invention.

Having thus described my invention,

what Iclaim as new, and desire to secure by Letters Patent, is,-

' 1. In a draft mechanism, the combination of a drum, a housing contained within the drum, the said housing having bearings for rotatably sustaining the drum, an electric motor located within the housing, and gear wheels for, connecting the electric motor with the drum.

2. In a draft mechanism, the combination of a drum, a housing located within the drum and having a bearing for maintaining one end of the drum, an annular gear located within the drum and having a bearing on the other end of the housing, gear wheels connecting the electric motor with the annular gear. 3. In a draft 'inechanism, the combination of a drum, ahousing located within the drum and having a hearing at one end for maintaining the drum in position, an annular gear located within the drum and having a bearing on the other end of the housing, gear wheels for connecting the electric motor with the annular gear, and means for connecting the annular gear with the drum. I

4. In a draft mechanism, the combination of a drum, a housing located within the drum, the housing having bearings for maintaining the drum, an annular gear located within the drum, an electric motor located within the housing and gear wheels connecting the electric motor with the annular gear and a plate secured to the an nular gear for closing the lower end of drum.

5. In a draft mechanism, the combination of a drum, a motor located within the drum, an internal annular gear located within the drum-and for driving the drum and cam surfaces for causing engagement of ,in the drum'and for driving the drum and an annular ratchet located in the drum and .a coacting ratchet connected to the annular gear and cam surfaces for moving the annular gear to cause engagement between the ratchets.

7 In a draft mechanism, the combination a of a drum, a' housing located within the drum, an electric motor contained within the housing and secured thereto, the housing. having a bearing for rotatively supporting the drum, an annular gear, means for detachably connecting the drum with the annular gear, the housing having a bearing for supporting the annular gear, gears connecting the electric motor with the annular gear.

. and a ratchet means for connecting the annular gear with the drum.

9. In a draft mechanism, the combination of a drum, a housing located within the drum, a supporting base connected to the housing, the housing having bearin s for rotatively supporting the drum, an e ectric motor secured to the housing and located within the drum, means for detachably connecting the electric motor with the drum for rotation of the drum.

10. A ca stan having a barrel, an electric motor ocated w1th1n the barrel, :1 base for closing one end of the barrel, the motor i v Witnesses:

secured to the base, an annular gear, gear wheels for connecting the motor with the annular ear, means for detachablyconnecting t e annular gear with the barrel, the base having a bearing for rotatively supporting one end of the barrel and a sec 'ond bearing member connected to the base for rotatively supporting the other end of the barrel. a

11. A capstan having a barrel, an electri'c motor located within the barrel, a base,

a housing secured to the base for rotatively supporting one end of the barrel, the motor secured in the housing, an annular gear, a plate connected to the annular gear and covering one end of the barrel, and rotatively supported on the housing, the base hav- 'ing a bearing for rotativelysupporting the other end of the barrel.

In testimony whereof, I have hereunto signed my name to this specification in the presence of two subscribing witnesses.

SCOTT J. MATTHEWS.

H. H. Rnennnm'nn, J. H. WELLS. 

